Build your own garden kitchen – Solid half-timbered roof with OSB and welded sheeting
When building my garden kitchen, the next priority was to construct a robust wooden roof. The roof was to consist of solid wooden beams which I wanted to screw directly onto the walls made of glued aerated concrete blocks. The covering should be made with sheet piling and OSB boards.
My plan also included fitting the guttering, the end plates and gluing the welding membrane to make the roof weatherproof.
In this entry I will show you step by step how I carried out the individual installations and what I had to pay particular attention to. Of course, there are also some tips that you are welcome to adopt.
Which material for the garden kitchen roof?
When building my garden kitchen, I set myself the ambitious goal of building a roof that would defy snow and rain so that neither barbecuing nor cooking would ever be affected by bad weather again.
It was also particularly important to me that the bar is partially covered so that I can enjoy my morning coffee regardless of the weather.
I therefore planned a roof with an overhang of one meter to the front, while the side overhang was to be smaller to protect only the walls from precipitation. After all, I didn’t want to create any additional recreation areas here.
With the desire to later equip the roof with several photovoltaic modules, it had to offer a high load-bearing capacity and a stable surface for secure installation.
Materials such as trapezoidal sheets, corrugated sheets or twin-wall sheets did not meet my requirements as they would not withstand the wind loads of the PV modules.
Instead, I opted for a robust half-timbered substructure made of solid wooden beams. The roof itself was to be made of strong OSB boards, which I then wanted to waterproof with a slated welded membrane.
To make the OSB boards invisible from below, I integrated an additional layer of sheet piling into my plans.
To turn my plans into reality, I called in my trusted carpenter. Together we discussed the technical and design aspects of the project.
After a detailed calculation of the statics, the wooden beams were cut to size, stripped and prepared for assembly.
I painted the beams myself again. In addition to the financial savings, I was able to ensure that every detail matched my vision.
Zuletzt aktualisiert am 21. November 2024 um 06:00 . Ich weise darauf hin, dass sich hier angezeigte Preise inzwischen geändert haben können. Alle Angaben ohne Gewähr. (*) Bei den verwendeten Produktlinks handelt es sich um Affiliate Links. Ich bin nicht der Verkäufer des Produktes. Als Amazon-Partner verdiene ich an qualifizierten Verkäufen. Dein Preis ändert sich jedoch nicht.
Parts list and dimensions for the building materials
Timber framework KVH Nordic spruce (untreated)
- 500 x 25 x 12 Crossbar front
- 500 x 20 x 10 Crossbar rear
- 500 x 20 x 8 counter beams (7 pieces)
- 300 x 12 x 12 Post and support front
Planking for 21 m² Nordic spruce (dried and planed)
- 500 x 14.5 x 2.8 with tongue and groove profile
OSB panels
- 250 x 62.5 x 1.8 with tongue and groove profile
The dimensions are in centimeters.
- ⭐ Hochwertige Holzschutzfarbe für Innen- und Außenbereich: Verleihe Holzoberflächen mit dieser hochwertigen Holzschutzfarbe eine attraktive und langlebige Optik im Innen- und Außenbereich.
- ⭐ Gute Haftung, hohe Deckkraft, einfache Verarbeitung: Diese Holzschutzfarbe bietet eine ausgezeichnete Haftung auf verschiedenen Holzoberflächen. Sie zeichnet sich durch eine hohe Deckkraft aus, sodass eine effektive Abdeckung mit weniger Anstrichen erreicht werden kann. Die Farbe lässt sich leicht verarbeiten, sei es mit einem Pinsel, einer Rolle oder einem (luftlosen) Sprühgerät.
- ⭐ Die Holzfarbe ist seidenglänzend und hat vielseitige Anwendungsmöglichkeiten: Der Holzlack eignet sich für eine Vielzahl von Holzoberflächen, darunter Holztüren, Holzfenster, Holzzäune, Holzschränke, Holztische, Holzstühle, Holzfassaden, Holzbalken, Gartenmöbel und mehr. Verleihe jedem Projekt ein professionelles Finish.
- ⭐ Umweltfreundlich: Der Holzlack ist wasserbasiert und enthält keine schädlichen Lösungsmittel, was ihn umweltfreundlich und sicher in der Anwendung macht.
- ⭐ Schnelle Trocknungszeit: Die Holzfarbe trocknet schnell, sodass Sie das Ergebnis in kürzester Zeit bewundern können. Innerhalb weniger Stunden ist die Oberfläche trocken und einsatzbereit.
- ⭐ Deutsche Qualität: Der Holzlack wird in Deutschland hergestellt und erfüllt höchste Qualitätsstandards. Hergestellt mit Liebe zum Detail und Präzision.
- ⭐ Ideal für Renovierung oder Neuanstrich: Diese Holzschutzfarbe ist perfekt für Renovierungsprojekte oder den Neuanstrich von Holzoberflächen geeignet. Sie verleiht dem Holz ein frisches Aussehen und bietet gleichzeitig einen effektiven Schutz.
- ⭐ Anwendbar als Deckfarbe, Wetterschutzfarbe oder Holz Decklack: Dieser Holzlack kann als Deckfarbe verwendet werden, um eine gleichmäßige und schützende Oberfläche zu erzeugen. Er eignet sich auch als Wetterschutzfarbe oder als Holz Decklack, um die Haltbarkeit und den Schutz des Holzes zu verbessern.
- ⭐ Große Farbauswahl: Verfügbar in einer breiten Palette von attraktiven Farben, um Ihren individuellen Stil und Geschmack zu treffen. Wählen Sie aus verschiedenen Farbtönen, um das gewünschte Aussehen Ihrer Holzoberfläche zu erzielen.
- ⭐ Einfache Reinigung und Pflege: Die Farboberfläche ist leicht zu reinigen und zu pflegen, um das schöne Aussehen des Holzes langfristig zu erhalten.
Assembly of truss beams for the roof
Once all the beams had been carefully painted, the construction of the load-bearing truss structure began, an essential step in giving my garden kitchen a solid and durable roof.
Assembly began with the attachment of the large 500 x 20 x 10 centimeter crossbar to the rear wall.
This beam, which was carefully laid on the aerated concrete blocks and fastened with 30-centimeter-long wood screws at 50-centimeter intervals, would later form the basis for the counter beams.
The flat support of the beam on the entire wall surface ensured optimum load distribution, which did not impair the statics of the Ytong blocks.
To install the rafters running lengthwise, I still had to attach the front cross beam measuring 500 x 25 x 12 cm.
As the bar was designed as an open corner, this beam was placed on a short, approximately 50-centimeter-long section of wall next to the bar counter.
The installation of a support post above the bar was essential, with particular attention being paid to the structural requirements, as the post had to bear a considerable part of the roof load and transferred this directly to the corner of the bar, which was made of aerated concrete blocks.
To minimize the risk of breakage and distribute the load more effectively, I inserted a 5 mm thick, 20 x 20 cm checker plate made of aluminum between the 12 x 12 cm load-bearing post and the aerated concrete block.
The metal plate distributed the weight over a larger area and thus provided additional stability. The post was secured with a metal threaded rod that reached through the checker plate into the aerated concrete block and provided a firm anchorage.
Once the two cross beams were installed, the next step was to align and attach the rafters, starting with the outer beams to ensure even spacing.
The planned overhang to the front and rear was taken into account during assembly before the rafters were firmly screwed to the frame timbers.
Install gas concrete blocks flush with the roof
Before I could start installing the sheet piling for the roof of my garden kitchen, I had to do some preparatory work.
One of these was the final preparation for the installation of the lighting, which required careful planning of the cable routing.
The empty conduits, which ended under the load-bearing crossbar in the rear wall, naturally needed a passage through the crossbar so that I could later connect the power cables to the lamps.
Given the limited space under the roof, it was clear that this work had to be completed before the roof layer was installed.
I marked the positions of the empty conduits on the beam and then used a Forstner bit to drill a 32-millimeter hole that led directly to the respective empty conduit. This preparation enabled me to pull the electrical cables through later without any problems.
Another detail that required my attention was the finishing of the side walls.
My aim was to have these flush with the roof in order to achieve a final roof line. After the rafters were installed, I now had the opportunity to transfer the angle and the exact height of the roof to the Ytong bricks.
I made matching wedges, which I carefully positioned and glued to the side walls.
To check the precision of my work, I drew a straightedge across the rafters. This method ensured that the walls were perfectly flush with the roof.
- Mit 750 Watt bringt die Universalsäge genügend Leistung auf das Blatt, um 150 mm in Holz und 10 mm in Stahl zu schneiden.
- Handlich in der Handhabung und flexibel im Einsatz ist die Universalsäge durch ihre ergonomische, schlanke Bauform.
- Zum material- und anwendungsgerechtem Arbeiten ist die Universalsäge mit einer Hubzahl-Elektronik ausgestattet, die gewissenhafte Voreinstellungen auf den zu bearbeitenden Werkstoffen erlaubt.
- Der werkzeuglos verstellbarer Sägeschuh ist für die optimale Sägeblattnutzung ausgelegt.
- Der werkzeuglose Sägeblattwechsel geht schnell und einfach von Hand, ganz ohne weiteres Werkzeug zur Montage.
- Ein großer Softgrip-Bereich gewährt einen sicheren und festen Halt zum komfortablen Arbeiten auch bei langwierigen Arbeitseinsätzen.
- In die Lieferung inbegriffen ist ein Sägeblatt für Holz.
Sheet piling and OSB boards as a roof
The beams of the timber frame already presented a very attractive picture. To maintain the charming country-style design, I decided to clad the area between the rafters with appropriately selected wood.
For this, I chose the Rauspund, whose boards with a thickness of 2.8 centimeters and a tongue and groove system have a high degree of stability. The installation also created an attractive pattern on the surface.
If I hadn’t planned to install a photovoltaic system on the roof at a later date, the sheet piling would have sufficed as the final layer. However, I reinforced the whole thing with an additional layer of OSB boards.
I mounted the first board with the tongue facing forward, i.e. away from the roof, flush with the front edge of the rafters and centered it.
This precision in the assembly of the first board was crucial, similar to the formwork stone wall that supports the slope behind our carport, because all other boards or formwork stones were based on it.
I then inserted the second board into the groove of the first board, aligned it and carefully knocked it against the first board with a mallet. I then fastened this and all the other boards with two wood screws per rafter.
Minor dimensional deviations on the sides were not a problem at this stage. Once the OSB boards were also installed, I planned to cut the sides cleanly and flush with the outer rafters using a hand-held circular saw.
Although the work was not particularly difficult or complex, it was quite time-consuming due to the large number of screws. With the right tools and the competent support of my father, the installation of the baffle boards was completed after a few hours.
Viewed from below, the roof now looked finished, but from above, the OSB boards were still missing in addition to the welded membrane, the installation of which was next on the agenda.
The panels, measuring 250 x 62.5 centimeters and 1.8 centimeters thick, were heavy but could be easily positioned after being lifted onto the roof.
The assembly was carried out in a similar way to that of the baffle. I positioned the first panel at the front left so that the springs were facing the outer sides.
The OSB panel was aligned starting from the rafters and screwed to the sheet piling, whereby I used shorter screws for the direct screw connection to the rafters. I marked the correct position of the screws with a long straightedge.
After attaching the first panel, I positioned the second panel to the right of it and drove the tongue of the panel into the groove of the first panel with a tapping block so that the two merged seamlessly before I also screwed the second panel in place.
I cut the third panel to the required size and used the remaining piece as the starting piece for the second row. In this way, I installed the entire surface in a bond, which further increased the stability.
The OSB panels were installed much more quickly and only took one morning.
Finally, I just had to saw the sides flush. To do this, I marked a point at the front and back, starting from the rafter underneath, and stretched a string with colored chalk.
When snipping, this left a clean and straight line along which I was able to saw off the OSB boards and the sheet piling underneath at the same time.
- Lieferumfang Handkreissäge 2 x Akku Ladegerät Makpac
Video: Building a half-timbered roof on the garden kitchen yourself
While building my outdoor kitchen, I kept my camera running. I then published the individual work steps in individual films in my playlist for building my garden kitchen on my YouTube channel.
I have also summarized the construction of the half-timbered roof in an exciting and informative video.
If you want to see more of me and my projects, feel free to check out my YouTube channel.
- Schlagwerk abschaltbar
- Bürstenloser Motor für mehr Ausdauer, längere Lebensdauer und kompaktere Bauweise
- Mit leuchtstarker LED
- Feinfühlig regelbare Drehzahl
- 2-Gang-Vollmetall-Planetengetriebe
Install end plates and rain gutter yourself
I had now covered the roof of my garden kitchen with tongue and groove boards and an additional layer of OSB boards. With a total thickness of just under 5 centimeters, it was stable enough to later safely support the elevation of the photovoltaic modules.
However, the roof was not yet watertight at this point. As a final layer, I planned to bond a slated welded membrane to prevent water from penetrating.
To keep the water out at the edges, the side in-situ sheets had to be installed first. An eaves plate was to protect the wood from water at the front and provide an aesthetic finish, while a rain gutter was to collect the water at the back and channel it into a cistern.
This meant that the rainwater could later be used to water the garden.
It was also necessary to install a gutter inlet to direct the water into the gutter. The eaves flashing, in-situ flashing and gutter flashing had to be fitted to the sides of the roof in such a way that there was an overlap and the water could always drain away to the rear.
I therefore started the assembly on the rear part of the roof. First, I placed gutter bars 50 centimeters apart, into which the rain gutter would later be hung.
I opted for a complete system with height-adjustable brackets, which allowed me to easily adjust the slope of the gutter at a later date.
After I had placed the gutter in the gutter bars as a test, I positioned the gutter slope so that the water could drain away optimally, making sure that there was an overlap of 10 centimeters. I then attached the metal sheets to the OSB board using sheet metal screws.
This was followed by the installation of the side in-situ panels. At the bottom, I positioned the in-situ sheets with an overlap on the gutter slope.
As the sheets were only 2 meters long, I had to push the sheets into each other to achieve the required total length. I put the sheets together so that the front sheet was 10 centimeters above the rear sheet.
Finally, I screwed on the front eaves panels. They lay sideways over the in-situ sheets, and here too I made sure there was an overlap of about 10 centimeters.
Glue the welding membrane to the roof yourself
Now all that was missing was the welding membrane that would permanently protect the roof from rain and snow. I opted for a slated S5 welded sheet.
The S5 welded membrane, especially in its coated version, is a high-quality waterproofing material that is widely used in the construction industry. This material is characterized by its multi-layered structure.
The base is formed by a carrier layer, which is typically made of glass fleece or polyester and gives the membrane its stability. A layer of bitumen is applied on top, which has impressive elastic and waterproof properties.
The surface of the slated S5 welding membrane is coated with fine slate granules, which not only provide an attractive appearance, but also significantly improve the UV and weather resistance of the welding membrane.
One of the biggest advantages of the slated S5 welded membrane is its durability and reliability in roof waterproofing.
The combination of a stable carrier layer and elastic bitumen layer ensures high tear resistance and flexibility, which makes the welded membrane particularly effective in the event of temperature-related expansion or contraction of the roof.
The slated surface also provides additional protection against mechanical damage, thereby extending the service life of the roof.
Another advantage is the quick and easy installation of the welded membrane. The welding process, in which the bitumen layer is liquefied by heat and fused to the substrate, creates a seamless and extremely tight bond that effectively keeps out water and moisture.
This makes the slated S5 waterproofing membrane an ideal solution for waterproofing flat roofs, balconies and terraces, where reliable watertightness is essential.
When installing the welded membrane on the roof of my garden shed, I deliberately decided against using a separating layer of roofing felt.
Normally, this should be placed under the welding sheet to protect the wood from the flames of the welding torch. However, my previous experience with this method was not convincing.
For example, a strong storm hit the welded sheeting on a neighbor’s garden shed and blew it off the roof along with the roofing felt, which was only nailed down – a clear sign of a lack of stability.
For this reason, I preferred to lay it directly on the wood and secured the welding work by keeping a water hose ready.
I rolled out the first welded sheet and positioned it at the outer edge so that it overlapped the side in-situ sheets, the front eaves sheet and the gutter overhang.
I then rolled it up again slightly without changing its position, so that the start of the track came to rest about one meter below the front edge of the roof.
I then used the welding torch to slowly heat the bitumen of the welding membrane, unrolled the membrane piece by piece upwards and bonded it to the substrate.
After a short cooling phase, the bonded area was firm enough to be walked on and the lower part of the welded sheet was welded in the same way.
The second welded sheet was then rolled out and placed on the roof with the necessary overlap to the first sheet before this was also welded.
In this way, I secured the entire roof with the welding membrane.
In combination with the water baffles, this created an absolutely watertight surface that reliably protected the wood underneath from the effects of the weather.
- ANWÄRMBRENNER-SET: 1x Hochleistungsbrenner – Stahl verzinkt & randverstärkt; 1x Propangasschlauch – 5,0 m, G 2 x 3/8“ L; 1x Propan-Konstantregler; 1x Griffstück mit Dreiwegeventil und fixierter Pilotflamme; 1x 60 cm Brennerrohr mit Brennerstütze
- ANWENDUNGSVORTEILE: Der Hochleistungsbrenner für Abflamm- und Heißklebearbeiten in Economy Ausführung, Niedriger Gasverbrauch durch exakte Brennereinstellung
- ANWENDUNGSGEBIETE: Flämmen von Bitumenbahnen; Aufwärmen; Abflammen; Verschweißen von Folien; Teerarbeiten; Dachisolierungen; Beton- und Mauerwerkstrocknung; Biologische Unkrautvertilgung und Moosbeseitigung; Auch optimal zum Auftauen/ Enteisen geeignet; Europalettenveredelung & Möbelveredelung im Vintage-Style zum Selbermachen
- ANWENDUNGSGEBIET UNKRAUTVERNICHTUNG: Das Gerät wenige Sek in einem Abstand von ca. 3 cm über das Unkraut führen. Die Flamme erreicht 1.000⁰C und bringt die Zellflüssigkeit der Wurzeln zum Gerinnen wodurch diese innerhalb weniger Tage vertrocknen, ein Verbrennen ist nicht nötig. Der umweltschonende Unkrautentferner kommt komplett ohne chemische Stoffe wie Glyphosat & Co aus
- TECHNISCHE DATEN: Flammentemperatur: bis 1060 °C; Gasdruck: max. 4 bar, 8 kg/h; Brennerbiegung mit 60 cm, ca. 35° gebogen; Brenner: Ø 57 mm
Summary and conclusion
When building my garden kitchen, I initially concentrated on constructing a robust and durable roof.
This consisted of a solid half-timbered substructure made of massive wooden beams, which were screwed directly onto the walls made of bonded aerated concrete blocks.
For the roof cladding, I chose sheet piling and OSB boards to create a stable surface for the later installation of photovoltaic modules.
I also made sure that the roof had an overhang to both partially cover the bar and protect the walls from precipitation.
The installation of the rain gutter, flashings and the bonding of the slated S5 welding membrane ensured that the roof was weatherproof.
Now that the roof has been completed, the interior fittings and the installation of the electrical systems are on the agenda.
This includes the installation of lamps, sockets and switches that will create a functional and cozy atmosphere in the garden kitchen.
Inside, I can now start installing the stainless steel furniture. The complete integration of my Napoleon Phantom P500 into the work surface will of course also be a highlight.
- Bitumen-Schweißbahn - Die Dachbahn ist modifiziert mit SBS-Elastomeren. Die Matrix ist ein Polyester-Vliesstoff mit hohem Flächengewicht, hoher Elastizität und sehr hoher Reißfestigkeit
- Hochwertige Abdichtungsbahn - Die Außenfläche der Dachpappe ist mit groben Mineralstreuseln bedeckt, die Unterseite ist mit einer leicht schmelzbaren Kunststofffolie befestigt. Entlang einer Kante der Schweißbahn gibt es eine Überlappung, die mit Kunststofffolie befestigt ist
- Professionelle Dachabdichtung - Ideal als Deckschicht von mehrlagigen wasserdichten Dacheindeckungen im Neubau und bei Renovierung alter Bitumendacheindeckungen
- Lieferumfang - Enthalten ist eine Rolle Schweißbahn PYE PV 200 S5 beschiefert in grau mit den Maßen 1 x 5 m² (EN 13707:2004+A2:200; EN 13707+A2:2012; EN 13501-5+A1:2010)
- Qualität von Isolbau - Alle Isolbau Produkte werden unter höchsten Qualitätsstandards entwickelt und hergestellt und haben sich über Jahre in der Baubranche ausgezeichnet und bewährt
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